Railway car truck



i l'Patented June `19,` 1945 RAILWAY CAR TRUCK -George E. Datli, Mokena,Ill., assignor to W. H.

Miner, Inc., Chicago, Ill., a corporation of Dela- Ware Application`June 29, 1'944, serial No. 542,676

s claims. (ci. 18s- 33) This invention relates\to'improvements inrailway car trucks.

One object of the invention is to :provide in a railway car truck meansfor snubbing ordampening the action of the truck springs, comprisingfriction means attached to and actuated by a member of the brake riggingof the car to engage the bolster of the truck andV frictionally op` posevertical -movement thereof when the brake shoes of the brake mechanismare releasedfrom engagement with the car wheels.

l Amore specific obiectof the invention is to provide in a railway cartruck comprising a, body bolster and springs supporting the bolster,fric-.

tion means in the form of shoes or blocks having frictional engagementwith thelbolster to oppose Vertical movement thereof, thereby snubbingthe action oi' the truck springs, wherein the friction shoes or blocksare carried by'and xed to the usual brake beam of the brake rigging ofthe car whereby when the brakesare released by movement of the brakebeam in a direction toward the bolster, the shoes are brought intofrictional engagement with the bolster to provide the desired snubbingaction.

' Other objects of the invention will more clearly appear from the,description and claims hereinafter following.

In the drawings forming a part of this'specification, Figure 1 is a sideelevational view of a portion of a railway `car truck, illustrating myimprovements in connection therewith. Figure 2 is a -top plan View ofFigure 1, showing one side portion only of the truck, said view beingpartly broken away. Figure' 3 is a vertical sectional view, lengthwiseof the car, corresponding substantially to the line 3 3 of Figure 2 andillustrating a modied form of the invention. Figure 4 is a transverse,vertical sectional view, corresponding substantially to the line 4-8 of.Figure 1, said view being broken at the central portion of the railwaycar truck. y

In said drawings, I il indicates one of the side frame members of arailway car truck of the wellknown "unit type. The side frame Ill, asshown,

-is in the form of a casting and has top and bottom members II and Il.lconnected by spaced, vertical sections I3-I3 forming guides for thetruck bolster. On the inner side of each side frame, guides I 4-I4 areprovided to the front and rear of -the opening between the spaced,vertical sections I3-I3. The guides I 4-I4 are former by inwardlyextending, top and bottom anges I5 and I6 and connecting end section I 1projecting from the inner side wall of the side frame at the bottommember I2 thereof. The flanges I5 and I6 incline upwardly in directionstoward the front and rear of the truck, thuspresenting inclined guidechannels closed at their outer ends.

As shownzmost clearly in Figure 4,- the truck includes twoV side framemembers IU-III located at opposite sides of the truck. The truckincludes, in addition, a truck bolster I8, as shownin `Figures l, 2, and3, and wheels I9-I9 atyopp'osite sides of said truck. The bolster I 8has its `opposite ends guided between .the vertical sections I3-I 3 ofthe truck side frames ill-I0 and is supported by the springs 2li- 2b.vAs most clearly shown in Figure l, the sections Iii-I are'inwardly'oiset'at their upper end portions'to provide guides 2 I-zIwhich cooperate with guide seats 22-22 at the sides of the bolster i 8.YThe truck illustratedin the drawings is of the spring'lplankless typeand the truck springs are supported directly on the bottom membersI2--I2 of the side frames Ill-I0; the I usual spring plates 'beingemployed at the top and bottom of each' cluster of "truck springs.

The lbrake beams of the brake rigging of the car, associated with eachtruck, are indicated by 23-23, These brake beams are disposed in thetruck respectively in fron-t of and to the rear of the bolster I 8, thatis, are locatedv at the front and rear portions of the truck. Brakeshoes 2li-24 cooperate with the wheels Ill-I 9 in a wellknown manner,said shoes being carried by the brake beam heads 25-25, of Well-knowndesign, fixed to the brake beams 'i3-23. beamv 23 includes the usualcompression and tension members 26 and 27, the brake beam shown being ofthe well-known truss construction which has the compression and tensionmembers thereof separated at the middle by a strut or fulcrum, to whichthe truck brake lever is attached for actuating the beam to apply andrelease the brakes by moving the brake shoes into and out of engagementwith the brake wheels.

Incarrying out my invention, I provide friction shoes A-A fixed toopposite ends of the brake beams 23--23 of the car truck andfrictionally engaging the truck lbolster to-retard vertical movementthereof, thus snubbing the action of the truck springs.

Referring to the embodiment of the invention illustrated in Figures 1,2, and 4, and the modification illustrated in Figure 3, itis pointed outthat the construction and design involved is the same in Figure 3 as inFigures 1, 2, and 4, with the exception that a tension spring B is usedfor forcing the friction shoes A against the truck bolster.

Each friction shoe A is preferably in the form Each brake thecorresponding en'd wall or platemember 28, a transverse bottom wall 29extending outwardly from the lower end of the wall 29, and spaced websor side anges 30-33 connecting the end and bottom walls. At the outerside of the casting, a transverse web 3|, parallel to the bottom wall,is provided between the side flanges 39-30 and above said bottom wall.The web 3l is connected at its inner end to the bottom wall 29 and theanges 30-30 by a vertical wall section 32. Av laterally outwardlyprojecting guide lug 33 is provided at the bottom of the shoe A adaptedto slide in the guideway I4 of the truck side frame I at thecorresponding side ofthe truck, the lug 33 being hollow and having topand bottom walls 34 and 35, which are continuations of the web 3l andthe bottom wall 29, and a verti-v cal end wall 33 connecting the top andbottom walls 34 and 35. The opening of the hollowlug is continuous withthe opening between the web. 3l and the bottom wall 29 of the shoe, acontinuous socket I9 is th'us provided adapted to receive of the member29 of the brake beam 23.

The friction shoes A are four in number for each truck, said shoes beingarranged in pairsv at opposite ends of the brake beams 23-23, themembers of each pair being disposed at opposite sides of the truckbolster I8 with the plate members 28-28 thereof adapted to engage theopposed vertical side faces of the bolster. 'I'he shoes A--A at Oppositeends of each brake beam are mounted on the ends of the compressionmember 26 of said beam, the ends of the member 29 being seated inthesockets 40-49 of the shoes.

The brake beam heads 25- 25 at opposite ends oi each brake beam areprovided with spaced, attaching flanges 31-31 for mounting the same onthe brake beam, the flanges 31-31 of each brake beam head embracing theweb 3| and the wall 29 of the corresponding friction shoe Atherebetween. Any suitable means may be employed for securing the brakebeam heads 25 and the friction shoes A to the brake beam 23. As shown inthe present instance, these parts are secured by rivets 38-38 extendingthrough the flanges :i1-31 of the brake beam heads 2s, the web 3| andthebottom wall 29 of the friction shoe A,

andthe corresponding end of the compression member 26 of said brakebeam.

As will be evident, the shoes A--A at each side frame I0 of `the truckembrace the truck bolster I8 at opposite sides and move in unisn withthe brake beam away from and toward the bolster as the brakes arerespectively applied and released. The releasing action of the brakesthus brings the\ friction shoes A-A 'into tight frictional contact withthe bolster to resist vertical movement thereof and snub the action ofthe truck springs.

Referring to the modification of the friction snubber as shown in Figure3, the spring B connects thevfriction shoes A-A at opposite sides 0f thebolster, the shoes being provided with inwardly projecting eyes 39-39 towhich the opposite ends of the spring are anchored, the

2,378,538 of a casting including a vertically disposed end it is founddesirable to increase the snubblng action.

I have herein shown andv described what I now consider the preferredmanner of carrying out my invention, but the same is merely illustrativeand I contemplate all changes and'modications that come within the scopeof the claims appended hereto.

I claim:

1. In arailway car truck including side frames at opposite sides of thetruck, wheels carried by said truck, a truck bolster vertically guidedin said side frames, and truck springs supporting said bolster on theside frames,l the combination with brake beams at opposite sides of saidbolster having brake shoes cooperating with the truck wheels, said beamsbeing movable away from and toward the bolster as the brakes are appliedand released; of friction shoes at opposite sides of said bolster iixedto the brake beams and movable applied; of a friction shoe-fixed tosaidbrake' beam, said shoe having a friction surface,l said shoe beingmoved into engagement with the side of the bolster by movement ci.' saidbeam'toward the bolster and thereby retard vertical movement of thebolster and snub the action of the truck springs.

3. Ina railway car truckV including a side frame, a truck bolster guidedforl vertical movement in said side frame, and trucksprings supportingsaid bolster on the side frame, the combination with a brake beamlaterally movable toward and away from the side of the bolster, when thebrakes are respectively released and applied; of a friction shoe havinga friction surface engageable with said bolster, said shoe being fixedto the brake beam and movable therewith toward the bolster to engage theshoe with the bolster and retard .vertical movement of the latter tosnub the action l-of the truck springs; and cooperating guide means onsaid shoe and side frame for guiding the shoe and brake beam.

4.. In a railway car truck including a side frame, a truck bolsterguided f or vertical movement in s'aid side frame, and truck springsysupporting said bolster on the side frame, the combination with a brakebeam laterally movable toward' and away from the side of thebolste'r,when the brakes are respectively released and applied;

of a friction shoe having a friction surface engageable with saidbolster, said shoe being xed to the brake beam and movable therewith t0-ward the bolster to engage the shoe with the bolster and retard verticalmovement of theflatter to. snub the action of the truck springs; alaterally extending guideway on thesideframe; and a guide lug on saidshoe slidably guided in said guideway.

y 5. Ina' railway car truck including a side frame, va truck bolsterguided for vertical movement in said side frame, and truckspringssupporting said bolster on the yside frame, the com- :,svause 3 binationwith a brake beam laterally movable Y toward and away from the side ofthe bolsterl when the brakes are' respectively released and applied; ofa friction shoe having a friction surface engageable with said bolster,said shoe being fixed toxthe brake beam and movable therewith toward thebolster to engage the shoe with the bolster and retard vertical movementof the latter to snub the action of the truck springs; a laterallyextending guideway on said side frame. said guideway being inclinedupwardly and out- Wardly; and a lug on said shoe slidably guided in saidguideway.

6. In a railway car truck including side frames at opposite sides of thetruck, wheels carried `by said truck, a truck bolster vertically guidedin said side frames, and truck springs sup'- porting said bolster on theside frames, the combination with brake beams at opposite sides offrame, a truck bolster guided for vertical movement in said side frame,and truck springs supporting said bolster on the sideframe, thecombination with a pair of brake beams respectively at opposite sides ofthe bolster, saidbeams being laterally movable away from and toward saidbolster when the brakes are 'respectively applied and released; of afriction shoe fixed to each brake' beam, said shoes having frictionsurfaces,

said shoes being movable into engagement with v said shoes against thebolster.

8. In a railway car truckl including a side frame, a truck bolsterguided for vertical movement in said side frame, and truck springssupporting said bolster on the side frame, the comsaid bolster havingbrake shoes cooperating with bination with. a pair of brake beamsrespectively the truck wheels, said beams being movable away from andtoward the bolster as the brakes are applied and released; of frictionshoes at oppo-Y site sides of said bolster fixed to the brake beam r andmovable therewith toward the bolster to engage the same when the brakesare released, said shoes having friction faces engageable with op- 7. Ina railway car truck including -'a` side at opposite sides of thebolster, said beams being laterally movable away from and toward saidbolster when the brakesare respectively applied and released; of afriction shoe xed to each brakeA beam, said shoes having frictionsurfaces, said shoes being movable into engagement with op posite sidesof the bolster by movement of said brake beamstoward the bolster toretard vertical movement of the latter and snub the action of the trucksprings; and a tension spring connecty ing said-shoes and forcing Ithesame against the holster. ,n v GEORGE E. DATH.

